Method of manufacturing an optical fiber
AssigneeFujitsu Limited
InventorsMasao Kawashima, Hisanao Okada, Bun Kikuchi
Life of this patent
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Abstract
A method of manufacturing an optical fiber having no defect in the refraction index profile comprising manufacturing a bare fiber by heating and extending a core starting material and forming a cladding layer on said core to produce a double-layer of the core and cladding with different refraction indices. Fine granules of oxide for the glass cladding can be formed by vapor deposition on the bare fiber, and these can be fused to form the cladding by heating. Another method for forming the cladding layer is to pass the bare fiber for the core through a fine hole provided at the bottom of a crucible in which the glass for the cladding is contained in liquid form.
Claims10
A method of manufacturing an optical fiber comprising a core and at least one glass cladding on said core, said method comprising the steps of:
- manufacturing said core to comprise a bare fiber by heating and extending a starting material for said core,
- coating a starting material for said at least one glass cladding in the form of fine granules of oxide onto said core, and
- forming said at least one glass cladding by heating said fine granule oxide coating.
Dependencies are inferred from the claim text.